metal decoration by decoral technology superdurable wood grain

metal decoration by decoral technology superdurable wood grain

METAL DECORATION BY DECORAL® TECHNOLOGY
SUPERDURABLE WOOD GRAIN
Alessandro Canevarolo
Bologna, 19 maggio 2011
Wood Grain - Comparative test
Wood Effect
Sublimation Process (Heat transfer)
on coated metal surface
Sublimation Process (Heat Transfer)
Phisical process by which some substances at given temperature move directly from
solid to gas status.
Sublimatic ink support
Sublimatic ink (dyes)
Powder coating layer
200°C
Aluminum
Sublimatic ink substrate
Printed Sublimatic ink (dyes)
Powder coating layer
Aluminium
Used Raw Materials
- Polyurethane Powder Coating
- Heat Transfer Film
(printed with sublimatic Ink)
Sublimation Process Advantage
High print definition
Sublimation Process Advantage
Suitable to be applied to different shapes
Wood Grain Comparative tests
Wood Grain on Superdurable PUR Powder
vs
Wood Grain on Standard PUR Powder
Superdurable Polyurethane Powder
Series DS 04XX S & Series DS 07XX S
New formulation of powder coating including:
- special resins
- special combination of UV inibhitors
Samples Preparation
Powder Coating + Decoral Process
- Powder coating, carried out in compliance with TDS
temperature and time (20'@ 200°C)
- Decoration according to sublimatic film TDS
(peak temperature 200°C)
Obtained Samples
Two series of samples
- A1, B1, …, N1 serie made by Superdurable powder
coating (green line)
-
A2, B2, …, N2 serie made by Standard powder
coating (red line)
Tests
Accelerated Weathering Test – AWT
-
Decoral Laboratory
Controlled and repeatable
simulation of some natural exposure factor
3000 hours duration
Natural Exposure Test – NET
-
South Florida (AWSG)
Real enviroment
Unpredictable test
12 months exposure
Accelerated Weathering Test
Decoral Laboratory
ISO 11304
- irradiation, 550 ± 20 W / m 2 (290-800 nm)
- black panel temperature, 65 ± 5 ° C
- wet cycle 18 minutes
- dry cycle 102 minutes.
Accelerated Weathering Test
Evaluated Parameter
every 100 hours until 3000 hours
-
Residual gloss % (60° angle, ISO 2813)
-
Colour Variation (ΔE CIELAB, ISO 7724/3)
AWT – Residual Gloss%
Remarks: 3000 hours are 3 times minimum required by international specification
AWT – Residual Gloss%
Superdurable serie (DS 07XX S)
-
Residual gloss % of Superdurable wood grain > 80% @ 3000 Hours
-
Residual gloss % of Standard wood grain > 50% @ 1000 Hours
Remarks: 3000 hours are 3 times minimum required by international specification
AWT – Colour Variation
Remarks: 3000 hours are 3 times minimum required by international specification
AWT – Colour Variation
Superdurable series (DS 07XX S)
-
ΔE of Superdurable wood grain < 2 @ 3000 Hours (all pattern!)
-
ΔE of Standard wood grain < 2 @ 1000 Hours
Remarks: 3000 hours are 3 times minimum required by international specification
AWT – Tested Samples – 3000 h
Tested
Samples
D1
D2
(superdurable wood grain)
(standard wood grain)
Remarks: 3000 hours are 3 times minimum required by international specification
AWT – Tested Samples – 3000 h
Tested
Samples
I1
I2
(superdurable wood grain)
(standard wood grain)
Remarks: 3000 hours are 3 times minimum required by international specification
Natural Exposure Test
ATLAS
Weathering Service Site
ISO 2813



- south Florida site
- 12 months exposure
- facing south
- tilt angle 5°
- open backing
Natural Exposure Test – 12 months
Evaluated Parameters
(after 12 months exposure & cleaning process)
-
Residual gloss % (60° angle, ISO 2813)
-
Colour Variation (ΔE CIELAB, ISO 7724/3)
NET – Residual Gloss%
NET – Residual Gloss%
-
Residual gloss % of Superdurable wood grain > 90% after 12 months
exposure
-
Residual gloss % of Standard wood grain > 50% after 12 months
exposure
NET – Colour Variation
NET – Colour Variation
-
ΔE of Superdurable wood grain < 2 after 12 months exposure (all
pattern!)
NET – Exposed Samples – 12 months
Unexposed
part
D1
D2
(superdurable wood grain)
(standard wood grain)
NET – Exposed Samples – 12 months
Unexposed
part
I1
I2
(superdurable wood grain)
(standard wood grain)
Conclusions
- Excellent results are linked to a new
formulation experience
- Superdurable series (DS 04XX S & DS 07XX S)
levels up the weathering resistance
- Performance improvement for a wide range
of finishing (different wood grain)
Future
- Expand the exisiting market for heattransfer technology
- Open new fields of application
- Complying with more strict requirements
More information at:
www.decoral-system.com